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I have a sample of 3D points (x,y,z) with tepmerature attribute. I can import my data as a 3D vector map. I want to create a volume of voxels by using v.vol.rst. When I use this module, this error happens WARNING: strip exists with insufficient data Processing all selected output files will require 0 bytes of disk space for temp files

can somebody help me how to solve this problem?


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Regions settings?? g.region vect=<vector points map> – Micha Jul 12 '13 at 13:31
yes. i set the extent of region based on input 3D vector points. – user19970 Jul 15 '13 at 2:02
The "WARNING" part usually means that there are no points in part of the region. It should not cause the interpolation to fail. But the "require 0 bytes" means that something else is wrong. Perhaps a small sample of your data would help to find what the problem is? – Micha Jul 16 '13 at 7:04
Thanks Micha for the reply. Here is a sample of my data: – user19970 Jul 16 '13 at 12:35
320554.395 5814603.902 45.169 24.60 – user19970 Jul 16 '13 at 12:51

When I mentioned a "small sample" I didn't mean that small ;-) Anyway, I copied the 5 points into a text file, made it "comma-separated" and improted into GRASS with: -z in=temp_pts.txt out=temp_pts fs=, columns="X double precision, Y double precision, Z double precision, T double precision" z=3 

I set the region to the imported vector map, with a very small resolution (only so few points):

g.region vect=temp_pts res=0.1 -p3

Then I could run the following to get a 3D raster:

v.vol.rst --o in=temp_pts wcol=T elev=temp_interp npmin=4 dmin=0

The dmin and npmin are artifically small to allow for the tiny set of points, but it seems to work...

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